Of course drugs, can cause a failed drug test. But according to Seinfeld, eating poppyseed muffins can cause a failed drug test as well.

Now I thought this had been debunked. That in order for you to test positive for opium, you have to eat more Poppy seeds than any human technically could. Which is technically true according to this New York Times article. Even though the Poppy seeds will show up on your test, the level wouldn't be high enough to consider it a positive test.

Now, here are 6 every day things that can pop up on a drug test according to medicaldaily.com

  1. Cold remedies
  2. Vitamin B supplements
  3. Ibuprofen
  4. Poppy seed bagels (as seen above courtesy to Elaine)
  5. Snack bars
  6. Tonic water

And on a random note, according to the website livescience.com, baby soap can actually give a false positive for marijuana. A study done in 2012 showed that many different brands of baby soap, for some strange reason, caused THC to show up on a drug test.

While it might show up as a positive test for THC, good luck using "I was washing my baby" as an excuse for it popping up on the test. Especially if you're so stoned you make the excuse, despite not having a kid.